An internet advertising system and method that enables a third party professional to manage the creation, publication, and display of advertisements on internet media venues owned or controlled by entities other than the seller and other than the third party professional in a form automatically modified to comply with the media venues' presentation rules, which may include design or style standards for "look and feel," editorial standards, and distribution factors. Self-serve, menu driven interfaces are provided for third party professionals to target internet media venues, and for internet media venues to enter their presentation rules. An ad modification engine processes or customizes the advertisement for publication and display on each internet media venue in compliance with the media venue's presentation rules.